package org.bw.bookstore.book.utils;

import com.google.zxing.common.BitMatrix;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;


public final class MatrixToImageWriter { 
   
  private static final int BLACK = 0xFF000000; 
  private static final int WHITE = 0xFFFFFFFF; 
   
  private MatrixToImageWriter() {} 
  public static BufferedImage toBufferedImage(BitMatrix matrix) { 
    int width = matrix.getWidth(); 
    int height = matrix.getHeight(); 
    BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); 
    for (int x = 0; x < width; x++) { 
      for (int y = 0; y < height; y++) { 
        image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE); 
      } 
    } 
    
    return image; 
  } 
  public static void writeToFile(BitMatrix matrix, String format, File file) 
      throws IOException { 
    BufferedImage image = toBufferedImage(matrix); 
    if (!ImageIO.write(image, format, file)) { 
      throw new IOException("Could not write an image of format " + format + " to " + file); 
    } 
  } 
  
  public static void writeToStream(BitMatrix matrix, String format, OutputStream stream) 
      throws IOException { 
    BufferedImage image = toBufferedImage(matrix); 
    if (!ImageIO.write(image, format, stream)) { 
      throw new IOException("Could not write an image of format " + format); 
    } 
  } 
   
}